Let mw know what you think. :)
That is actually a REALLY cool sounding idea. I'd imagine you'd have to switch what Fly does with Dive. Then make that DIVE accessible on every tile(which I think you can do by changing the behavior byte on Advance Map) And basically just make a HUGE map that pretty much covers every city. But, then set flags that don't allow you to land anywhere you haven't been before. I'm glad you thought this up, 'cause now I really wanna see how this works.